结果1 题目 已知2CrO42-+2H+#8652;Cr2O72-+H2O,K=1.0×1014 (1)求1molmiddot;dm-3铬酸盐溶液中,铬酸根离子的浓度占90%时,溶液的pH; (2)求1molmiddot;dm-3铬酸盐溶液中,重铬酸根离子的浓度占90%时,溶液的pH。 相关知识点: 试题来源: 解析 ∴1/2 反馈 收藏 ...
铬是一种银白色金属 化学性质稳定,以+2、+3和+6价为常见价态。工业上以铬铁矿(主要成分为FeO·Cr2O3,含有Al2O3、SiO2等杂质)为主要原料生产金属铬和重铬酸钠(Na2Cr2O7·2H2O),其
铬是一种银白色金属 化学性质稳定,以+2、+3和+6价为常见价态。工业上以铬铁矿(主要成分为FeO·Cr2O3,含有Al2O3、SiO2等杂质)为主要原料生产金属铬和重铬酸钠(Na2Cr2O7·2H2O),其
Spectrochimica Acta Part A Molecular SpectroscopyD. Michalska-Fong, P. J. McCarthy et K. Nakamoto. Infrared and Raman spectra of trans-[MX2(H2O)4]+ type complex ions (M = Ti(III), V(III) and Cr(III) and X = Cl and Br). Spectrochim. Acta, 39A:835-842, 1983....
The electron paramagnetic resonance of Cr(III) substituted for Al in a single crystal of NaMgAl(C2O4)3·9H2O was examined at two different microwave frequencies. The Cr(C2O4)33−ion was found to be nonaxially symmetric in this host crystal and to occupy six nonequivalent positions in ...
Non-photochemical spectral hole-burning in the 2EB4A2 transition of crystalline NaMgAl(oxalate)3?9H2O: Cr(III) Matthew L. Lewis and Hans Riesen* Fax: zz61 2 6268 8017; Tel: zz61 2 6268 86 79 in a crystal. Non-photochemical spectral hole-burning (NPHB) is an ubiquitous phenomenon in...